"test_SimpleAccessorWithFrom.drl" );
assertFalse( parser.getErrors().toString(),
parser.hasErrors() );
final PatternDescr pattern = (PatternDescr) rule.getLhs().getDescrs().get( 0 );
final FromDescr from = (FromDescr) pattern.getSource();
final MVELExprDescr accessor = (MVELExprDescr) from.getDataSource();
assertEquals( "something.doIt",
accessor.getExpression() );
}